tftpd(1M) tftpd(1M)
NAME
tftpd, in.tftpd - DARPA Trivial File Transfer Protocol server
SYNOPSIS
in.tftpd [-s] [-rrval] [-mmval] [-w windowsize] ["homedir"]
DESCRIPTION
tftpd is a server that supports the DARPA Trivial File Transfer Proto-
col (TFTP). This server is normally started by inetd(1M) and operates
at the port indicated in file /etc/services. By default, the entry for
tftpd in etc/inetd.conf is commented out. To make tftpd operational,
the comment character(s) must be deleted from the file. See
inetd.conf(4) for details.
Before responding to a request, the server attempts to change its
current directory to homedir; the default value is /tftpboot.
OPTIONS
-s Secure. When specified, the daemon also changes its root direc-
tory to homedir [see chroot(2)].
The use of tftp does not require an account or password on the
remote system. Due to the lack of authentication information,
tftpd will allow only publicly readable files to be accessed.
Files may be written only if they already exist and are publicly
writable. Note that this extends the concept of "public" to
include all users on all hosts that can be reached through the
network.
-rrval
Set the per-packet retransmission timeout, in seconds.
-mmval
Set the total transmission timeout, in seconds.
-d If the -d option is specified, each socket created by tftpd will
have debugging enabled [see SODEBUG in socket(3N)].
-w windowsize
Specifies the number of data packets sent without receiving an
ACK ("Acknowledgement Packet") beforehand (simple Window proto-
col). windowsize is a number between 1 and 10.
tftpd runs with the user ID and group ID set to [GU]IDNOBODY under
the assumption that no files exist with that owner or group. However,
nothing checks this assumption or enforces this restriction.
SEE ALSO
tftp(1), inetd(1M), netconfig(4).
Sollins, K.R., The TFTP Protocol (Revision 2), RFC 783, Network Infor-
mation Center, SRI International, Menlo Park, Calif., June 1981.
Page 1 Reliant UNIX 5.44 Printed 11/98